JPS64288Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an attachment for a nut tightening device used for tightening and loosening nuts during assembly of mechanical parts or construction work.

[Conventional technology]

Conventional nut tightening devices include those that engage and rotate the nut from the longitudinal direction of the bolt;
Alternatively, there is one that fits onto a nut from the side and rotates the nut using a ratchet machine.

[Problem that the invention attempts to solve]

In conventional nut tightening devices, which fit into the bolt from the longitudinal direction, if the bolt is long, the device may be jammed by the bolt and cannot reach the nut.

On the other hand, since the ratchet mechanism requires manual rotation, it takes a long time and is inefficient.

Furthermore, in the above two methods, the fitting portion of the nut had to be replaced to match the size of the nut, which was very time consuming and troublesome.

Further, since the conventional electric nut tightening device has an integrated power source, the device itself is large and lacks mobility.

The present invention was developed in view of the above-mentioned problems, and its purpose is to quickly and easily tighten and loosen nuts, regardless of the size, position, and condition of the nuts. An object of the present invention is to provide an attachment for a nut tightening device that securely holds and has good mobility.

[Means for solving problems]

The gist of the present invention to solve the above problems is that the base 2
an attachment body 1 is formed from a fixed arm 3 formed on the base body 2 and a movable arm 4 swingably attached to the fixed arm 3;
A drive roller 5 having a fitting hole 6 in the center is rotatably attached to the base body 2, and pinch rollers 7 having flanges 8 formed at the upper and lower ends are rotatably attached to the tips of the fixed arm 3 and the movable arm 4, respectively. In addition, the drive roller 5 and the pinch roller 7
This is an attachment for a nut tightening device, in which a ring-shaped belt 9 of the type described above is wound around a drive roller 5 and a pinch roller 7, and a spring 10 is provided between a fixed arm 3 and a movable arm 4.

[Effect]

The operation of the present invention will be explained based on FIG. In the figure, A is a nut, B is a bolt, and 11 is a projection provided intermittently on both sides of the belt 9.

Usually, the fixed arm 3 and the movable arm 4 are connected by a spring 1.
0, the belt 9 between the two pinch rollers 7 is under tension. When the nut A is pressed against the belt 9 in this part, the belt 9 is bent, and the movable arm 4 is drawn toward the fixed arm 3 against the elastic force of the spring 10.

In this state, when the drive roller 5 is rotated using some kind of power source, the belt 9 rotates, and the nut A, which is firmly held by the protrusion 11 of the belt 9, rotates to tighten and loosen the bolt B.

〔Example〕

1 to 3 show an embodiment of the present invention, in which C is a power source, D is a transmission shaft that fits into the fitting hole 6 of the drive roller 5; The rotation is transmitted to the drive roller 5.

The rotation transmitted to the drive roller 5 operates each element as shown in the section of the above-mentioned operation, and the nut A is rotated.
Tighten and loosen.

In this case, if the size of the nut A is small, the nut A is held in a deeply bitten state between the two pinch rollers 7, and conversely, if the size of the nut A is large, the nut A is bitten shallowly. The screws are held in a tight state so that operations such as tightening can be performed satisfactorily.

Further, the nut slider of the present invention is of an attachment type, and its power source is not specific, but any source near the position where tightening work is performed is selectively used.

FIG. 4 shows another embodiment of the present invention, specifically, the pinch roller 7 in FIG.
One of the rollers has the function of a driving roller 5. In this case, the operating method during use is no different from the method of the previous embodiment.

[Effect of idea]

As mentioned above, according to the present invention, the size of the nut,
Regardless of position and condition, tightening and loosening work can be performed quickly and easily, and furthermore, it can be easily moved as the work position changes, and the nut can be securely held during work. be able to.

[Brief explanation of drawings]

Fig. 1 is a plan view showing one embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a side view showing the state in which the nut is held, and Fig. 4 is a plan view showing another embodiment of the present invention. It is a diagram. 1... Attachment body, 2... Base body, 3...
... Fixed arm, 4... Movable arm, 5... Drive roller, 6... Fitting hole, 7... Pinch roller, 8...
...Flange, 9...Belt, 10...Spring, A...
...Natsuto, B...Bolt.

Claims (1)

[Scope of utility model registration request] An attachment body is formed from a base body, a fixed arm formed on the base body, and a movable arm attached to the fixed arm so as to be able to vibrate freely, and a drive roller having a power shaft fitting hole in the center is rotatably mounted on the base body. Attachment: a pinch roller having flanges formed at the upper and lower ends is rotatably attached to the tips of the fixed arm and the movable arm, respectively;
An attachment for a nut tightening device, characterized in that an annular belt that is connected to both the drive roller and the pinch roller is wound around the drive roller and the pinch roller, and a spring is provided between the fixed arm and the movable arm.